70820791 has 2 divisors, whose sum is σ = 70820792. Its totient is φ = 70820790.

The previous prime is 70820747. The next prime is 70820801. The reversal of 70820791 is 19702807.

It is a strong prime.

It is an emirp because it is prime and its reverse (19702807) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70820791 - 2¹⁷ = 70689719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70821791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35410395 + 35410396.

It is an arithmetic number, because the mean of its divisors is an integer number (35410396).

Almost surely, 2^70820791 is an apocalyptic number.

70820791 is a deficient number, since it is larger than the sum of its proper divisors (1).

70820791 is an equidigital number, since it uses as much as digits as its factorization.

70820791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 70820791 is about 8415.5089566823. The cubic root of 70820791 is about 413.7330908896.

The spelling of 70820791 in words is "seventy million, eight hundred twenty thousand, seven hundred ninety-one".